期刊
CURRENT APPLIED PHYSICS
卷 19, 期 12, 页码 1427-1435出版社
ELSEVIER
DOI: 10.1016/j.cap.2019.09.010
关键词
Ultrasonic-sprayed perovskite; Surface photovoltage; Defect states
资金
- Thailand Research Fund [MRG6282111]
- Electricity Generating Authority of Thailand (EGAT)
- National Science and Technology Development Agency (NSTDA) [P-17-51209]
- King Mongkut's University of Technology Thonburi through the KMUTT through the Research Center of Excellent
- Kasetsart University Research and Development Institute [228.61]
Methylammonium lead iodide (CH3NH3PbI3) based perovskite having low degrees of the disorder is of great interest for optoelectronic and photovoltaic applications. In this work, a layer of CH3NH3PbI3 was successfully prepared using an ultrasonically sprayed-nebulous method. Changes in structural and optical properties alongside with photo-induced charge separation and transportation behavior were systematically studied. The surface photovoltage spectra reveal a significant reduction of the density of deep defect states as the organic content was increased. It was observed that the measured values of Urbach energies decrease from 33.36 to 28.24 meV as the amount of organic content was increased to an optimum value. The best perovskite solar cells obtained using the sprayed-on approach exhibited a J(sc) of 16.54 mA/cm(2), a V-oc of 0.99 V, and a FF of 62.4, resulting in an overall PCE of 10.09%.
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